M5.1 Earthquake 7 km NNW of Mudanya, Turkey — December 4, 2023
2023-12-04 07:42:20 UTC (2023-12-04) · approx. 9:42 AM UTC+2 local
Felt by 251 people across surrounding communities.
On December 4, 2023 at 07:42 UTC, a magnitude 5.1 shallow crustal earthquake struck 7 km NNW of Mudanya, Turkey, at a depth of 10.1 km and coordinates 40.4371°, 28.8480°. This earthquake was detected by 104 seismic stations with excellent location accuracy and was assigned a USGS significance rating of 543, placing it among routine seismic activity.
Physical scale: An earthquake of magnitude 5.1 releases seismic energy equivalent to roughly 674 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 2.0 km — a useful intuition for the size of the slip patch on the fault.
The epicenter is located in Turkey, a region characterized by the North Anatolian Fault, a 1,500 km transform boundary driven by the westward extrusion of the Anatolian microplate. The nearest mapped fault system is the North Anatolian Fault. View all earthquakes in Turkey.
Learn more: Magnitude scale · Aftershock sequences
Did You Feel It? — community-reported shaking
Aggregated felt-report intensity from 251 citizen responses to the USGS Did You Feel It? system. Each colored zone represents the average MMI from reports in that area.
Source: U.S. Geological Survey Did You Feel It?. View on USGS · submit your own report
Earthquake Details
28.8480°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 5.1 earthquake near Mudanya, Turkey?
The magnitude 5.1 earthquake that struck 7 km NNW of Mudanya, Turkey on December 4, 2023 at 07:42 UTC had a depth of 10.1 km. For context, this was a moderate earthquake that could be widely felt.
Where did the earthquake occur?
The earthquake epicenter was located at 40.4371°, 28.8480°, which is 7 km NNW of Mudanya, Turkey. View all earthquakes in Turkey.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 5.1 earthquakes can continue for days to weeks and gradually diminish over time.
Has Turkey had earthquakes this big before?
The largest recorded earthquake in Turkey was the M7.8 Kahramanmaraş earthquake of February 6, 2023. Today's magnitude 5.1 event is significantly smaller than that historical record.
Authoritative source: USGS event page (event ID: us7000lg2l). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2023, December 4, 2023). M5.1 Earthquake 7 km NNW of Mudanya, Turkey — December 4, 2023. Retrieved August 21, 2025 from https://www.earthquaketracker.org/earthquakes/event/us7000lg2l/